reactos/rosapps/net/ncftp/sio/SWrite.c

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#include "syshdrs.h"
#ifndef NO_SIGNALS
extern volatile Sjmp_buf gNetTimeoutJmp;
extern volatile Sjmp_buf gPipeJmp;
#endif
#ifndef NO_SIGNALS
int
SWrite(int sfd, const char *const buf0, size_t size, int tlen, int swopts)
{
volatile int nleft;
const char *volatile buf = buf0;
int nwrote, tleft;
vsio_sigproc_t sigalrm, sigpipe;
time_t done, now;
if (SSetjmp(gNetTimeoutJmp) != 0) {
alarm(0);
(void) SSignal(SIGALRM, (sio_sigproc_t) sigalrm);
(void) SSignal(SIGPIPE, (sio_sigproc_t) sigpipe);
nwrote = size - nleft;
if (nwrote > 0)
return (nwrote);
errno = ETIMEDOUT;
return (kTimeoutErr);
}
if (SSetjmp(gPipeJmp) != 0) {
alarm(0);
(void) SSignal(SIGALRM, (sio_sigproc_t) sigalrm);
(void) SSignal(SIGPIPE, (sio_sigproc_t) sigpipe);
nwrote = size - nleft;
if (nwrote > 0)
return (nwrote);
errno = EPIPE;
return (kBrokenPipeErr);
}
sigalrm = (vsio_sigproc_t) SSignal(SIGALRM, SIOHandler);
sigpipe = (vsio_sigproc_t) SSignal(SIGPIPE, SIOHandler);
nleft = (int) size;
time(&now);
done = now + tlen;
forever {
tleft = (int) (done - now);
if (tleft < 1) {
nwrote = size - nleft;
if (nwrote == 0) {
nwrote = kTimeoutErr;
errno = ETIMEDOUT;
}
goto done;
}
(void) alarm((unsigned int) tleft);
nwrote = write(sfd, buf, nleft);
(void) alarm(0);
if (nwrote < 0) {
if (errno != EINTR) {
nwrote = size - nleft;
if (nwrote == 0)
nwrote = -1;
goto done;
} else {
errno = 0;
nwrote = 0;
/* Try again. */
}
}
nleft -= nwrote;
if (nleft <= 0)
break;
buf += nwrote;
time(&now);
}
nwrote = size - nleft;
done:
(void) SSignal(SIGALRM, (sio_sigproc_t) sigalrm);
(void) SSignal(SIGPIPE, (sio_sigproc_t) sigpipe);
return (nwrote);
} /* SWrite */
#else
int
SWrite(int sfd, const char *const buf0, size_t size, int tlen, int swopts)
{
int nleft;
const char *buf = buf0;
int nwrote, tleft;
time_t done, now;
fd_set ss;
struct timeval tv;
int result, firstWrite;
nleft = (int) size;
time(&now);
done = now + tlen;
firstWrite = 1;
forever {
tleft = (int) (done - now);
if (tleft < 1) {
nwrote = size - nleft;
if (nwrote == 0) {
nwrote = kTimeoutErr;
errno = ETIMEDOUT;
SETWSATIMEOUTERR
}
goto done;
}
/* Unfortunately this doesn't help when the
* send buffer fills during the time we're
* writing to it, so you could still be
* blocked after breaking this loop and starting
* the write.
*/
if (!firstWrite || ((swopts & kNoFirstSelect) == 0)) {
forever {
errno = 0;
FD_ZERO(&ss);
FD_SET(sfd, &ss);
tv.tv_sec = tlen;
tv.tv_usec = 0;
result = select(sfd + 1, NULL, SELECT_TYPE_ARG234 &ss, NULL, SELECT_TYPE_ARG5 &tv);
if (result == 1) {
/* ready */
break;
} else if (result == 0) {
/* timeout */
nwrote = size - nleft;
if (nwrote > 0)
return (nwrote);
errno = ETIMEDOUT;
SETWSATIMEOUTERR
return (kTimeoutErr);
} else if (errno != EINTR) {
return (-1);
}
}
firstWrite = 0;
}
#if defined(WIN32) || defined(_WINDOWS)
nwrote = send(sfd, buf, size, 0);
#else
nwrote = write(sfd, buf, size);
#endif
if (nwrote < 0) {
if (errno != EINTR) {
nwrote = size - nleft;
if (nwrote == 0)
nwrote = -1;
goto done;
} else {
errno = 0;
nwrote = 0;
/* Try again. */
}
}
nleft -= nwrote;
if (nleft <= 0)
break;
buf += nwrote;
time(&now);
}
nwrote = size - nleft;
done:
return (nwrote);
} /* SWrite */
#endif